nlist_aout.h revision 331722
1/*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)nlist.h 8.2 (Berkeley) 1/21/94 35 * 36 * $FreeBSD: stable/11/sys/sys/nlist_aout.h 331722 2018-03-29 02:50:57Z eadler $ 37 */ 38 39#ifndef _SYS_NLIST_AOUT_H_ 40#define _SYS_NLIST_AOUT_H_ 41 42/* 43 * Symbol table entries in a.out files. 44 */ 45 46/* 47 * Layout of each symbol. The "#ifdef _AOUT_INCLUDE_" is so that 48 * programs including nlist.h can initialize nlist structures 49 * statically. 50 */ 51struct nlist { 52#ifdef _AOUT_INCLUDE_ 53 union { 54 const char *n_name; /* symbol name (in memory) */ 55 long n_strx; /* file string table offset (on disk) */ 56 } n_un; 57#else 58 const char *n_name; /* symbol name (in memory) */ 59#endif 60 unsigned char n_type; /* type defines */ 61 char n_other; /* ".type" and binding information */ 62 short n_desc; /* used by stab entries */ 63 unsigned long n_value; /* address/value of the symbol */ 64}; 65 66#define n_hash n_desc /* used internally by ld(1); XXX */ 67 68/* 69 * Defines for n_type. 70 */ 71#define N_UNDF 0x00 /* undefined */ 72#define N_ABS 0x02 /* absolute address */ 73#define N_TEXT 0x04 /* text segment */ 74#define N_DATA 0x06 /* data segment */ 75#define N_BSS 0x08 /* bss segment */ 76#define N_INDR 0x0a /* alias definition */ 77#define N_SIZE 0x0c /* pseudo type, defines a symbol's size */ 78#define N_COMM 0x12 /* common reference */ 79/* GNU extensions */ 80#define N_SETA 0x14 /* Absolute set element symbol */ 81#define N_SETT 0x16 /* Text set element symbol */ 82#define N_SETD 0x18 /* Data set element symbol */ 83#define N_SETB 0x1a /* Bss set element symbol */ 84#define N_SETV 0x1c /* Pointer to set vector in data area. */ 85/* end GNU extensions */ 86#define N_FN 0x1e /* file name (N_EXT on) */ 87#define N_WARN 0x1e /* warning message (N_EXT off) */ 88 89#define N_EXT 0x01 /* external (global) bit, OR'ed in */ 90#define N_TYPE 0x1e /* mask for all the type bits */ 91#define N_STAB 0xe0 /* mask for debugger symbols -- stab(5) */ 92 93/* 94 * Defines for n_other. It contains the ".type" (AUX) field in the least 95 * significant 4 bits, and the binding (for weak symbols) in the most 96 * significant 4 bits. 97 */ 98#define N_AUX(p) ((p)->n_other & 0xf) 99#define N_BIND(p) (((unsigned int)(p)->n_other >> 4) & 0xf) 100#define N_OTHER(r, v) (((unsigned int)(r) << 4) | ((v) & 0xf)) 101 102#define AUX_OBJECT 1 /* data object */ 103#define AUX_FUNC 2 /* function */ 104 105/*#define BIND_LOCAL 0 not used */ 106/*#define BIND_GLOBAL 1 not used */ 107#define BIND_WEAK 2 /* weak binding */ 108 109#define N_FORMAT "%08x" /* namelist value format; XXX */ 110 111#endif /* !_SYS_NLIST_AOUT_H_ */ 112